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Full text of "Texas Instruments TI-92 Repair Manual"

Repairing Texas Instruments TI-92 Display 



iiixit 



Repairing Texas Instruments TI-92 Display 



Tools used in this guide 

• Phillips #00 Screwdriver (1) 

• Plastic Opening Tools (1) 



In this guide we will show how to remove the display to replace it if broken. 
incomplete we currently do not know how to do this and can find no information on it 



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Repairing Texas Instruments TI-92 Display 




Step 1 - installation Back Cover 

• The first step to any repair operation is to 
remove the front cover. 



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• Grab the back of the calculator with one hand and the 
cover with the other. 

• Pull the cover off from one of the sides for easy 
removal. 




Step 2 

• Orientate the calculator with the top facing towards you. 

• Slide the locking tab,found on the top part of the 
calculator, to the unlock position. 



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Repairing Texas Instruments TI-92 Display 




Step 3 

• "Locking Tab" 

• To remove the back cover, slide the cover away from 
the locking tab towards the bottom of the calculator until 
the cover no longer slides. 

• Then with the front of the calculator facing down, pull 
up on the back cover. 

• The calculator should now be orientated with the front 
facing down, as shown in picture 2. 




Step 4 - installation Batteries 

• The Batteries are now exposed and the 
calculator is face down with the back 
towards you. 



& 



• Remove the bottom batteries by pressing the battery 
towards you while pulling it out from the far end. 

• If you can not do the previous step with your 
finger try using a flat ended tool such as an 
Ipod opening tool. 



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• After the bottom battery has been removed push or 
slide the other(top) battery towards you until it is fully 
exposed in the battery slot. 

• Now simply remove the battery. 



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Repairing Texas Instruments TI-92 Display 




Step 5 - Back Case 

• Using a Philips Screwdriver #00 unscrew the twelve 
1 1 .8mm screws shown in the picture and located on the 
back of the calculator. 




Step 6 

Unscrew the 19mm screw located near center of the 
back of the calculator. 

• Remove the panel being held by the screw. 



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Repairing Texas Instruments TI-92 Display 




Step 7 

• Using the same Phillips screwdriver, unscrew the 
remaining three 11.8mm screws. 




Steps 

• Using the Ipod Opening Tool pull up on both sides of 
the rectangular module while keeping the rest of the 
calculator flat on a surface face down 



You may get a lot of resistance from the 
module. Do not use too much force as you 
risk damage. Use small amounts offeree to 
work the module out. 



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Repairing Texas Instruments TI-92 Display 




Step 9 

• Pull out the rectangular module when it is finally loose 
enough. 




Step 10 

• Now pull up on the back cover of the calculator while 



holding the rest of it flat on a surface. 

Be careful not to tilt the front of the 
calculator at this point. The keyboard 
buttons are now unsupported and will fall 
out of place. 



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Repairing Texas Instruments TI-92 Display 




Step 11 ' installation Motherboard 

• Pull the motherboard up while holding the rest of the 
calculator firmly in place 

• The motherboard has now separated from the rest of 
the calculator 




Step 12 - Display 

• Place the motherboard flat on a surface with 
the LCD screen facing down. 



& 



Using a #00 Philip Screwdriver remove the screw 
located on the left side of a spring-like object located 
near the center of the motherboard. 



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Repairing Texas Instruments TI-92 Display 




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Step 13 

• Lift up on the material covering the motherboard 
starting from the upper right corner. Peel foil back only 
about half way down. 

• Make sure to slowly lift up on the plastic of 
the covering material and not the foil or the 
foil will rip. 



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Step 14 

• Now slowly lift up the black tape located at the top of 
the calculator. 



• You will need to replace tape if removed so 
if you do not have this replacement part do 
not attempt to remove it 



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Page 8 of 10 



Repairing Texas Instruments TI-92 Display 




Step 15 

• Tilt the calculator up from the front so that you can see 
the LCD screen 

• Finish removing the black tape on this side of the 
motherboard. 




Step 16 

• Do not know next step 



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Repairing Texas Instruments TI-92 Display 



To reassemble your device, follow these instructions in reverse order. 



This document was last generated on Dec 14, 2010. 



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